They got this beast’s number.

A convicted killer on El Salvador’s list of most-wanted gang members has been arrested while living illegally in the US, according to the feds — with his mugshot showing “666” tattooed across his forehead.

Antonio Israel Lazo-Quintanilla was arrested last month in Maryland for driving without a license — but is wanted in his home country for a slew of terrifying felonies, including extortion, drug possession and aggravated homicide, the Department of Homeland Security (DHS) said Monday.

Antonio Israel Lazo-Quintanilla was described by Homeland Security as an illegal alien and convicted killer and gang leader. DHS

The illegal immigrant — who has other tattoos covering the rest of his face, under the giant “666” — is also “a confirmed member of the 18th S

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